吃大餐用英语可以说是 "have a big meal" 或 "eat a big meal." 来源方面，这两个表达都可以从英语中的动词 "eat" 和形容词 "big" 推导出来。

下面是一些例句：

I'm so hungry, let's have a big meal.

After a long day of hiking, we were ready to eat a big meal.

We always eat a big meal on Thanksgiving.

翻译如下：

我好饿，咱们吃个大餐吧。

徒步旅行一天后，我们准备吃个大餐了。

感恩节我们总是吃大餐。